If the quest is active, you must complete it first to see 카자두움.The best way to go to 카자두움 is to click on the navigation console on the "Vindikaar" and get teleported to the Destiny Point. Follow the way down and you can see the entrance to Nath'raxas Spire from a distance. Go in and then go straight ahead until you reach 카자두움.His abilities are:- 불타는 회전베기